Developer Tools
26 free tools for developers — JSON, Base64, JWT, regex, API testing and more.
JSON Formatter
Format, validate and minify JSON data
JSON to TypeScript
Convert JSON to TypeScript interfaces
Base64 Encode/Decode
Encode and decode Base64 strings
Base64 Image
Convert images to/from Base64
URL Encode/Decode
Encode and decode URL components
HTML Encode/Decode
Escape and unescape HTML entities
HTML Preview
Live preview of HTML code
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
UUID Generator
Generate random UUIDs/GUIDs
JWT Decoder
Decode and inspect JWT tokens
JWT Generator
Create JWT tokens with custom claims
Color Picker
Pick colours and get HEX, RGB, HSL values
Color Converter
Convert between HEX, RGB, HSL formats
CSS Gradient Generator
Create CSS gradient backgrounds
Box Shadow Generator
Design CSS box shadows visually
CSV to JSON
Convert CSV data to JSON format
Text Diff
Compare two texts and see differences
Chmod Calculator
Calculate Linux file permissions
Cron Parser
Parse and explain cron expressions
Cron Builder
Build cron expressions visually
Slug Generator
Create URL-friendly slugs
IP Info
Look up IP address details
Regex Tester
Test regular expressions with highlighting
API Tester
Send HTTP requests and inspect responses
Lorem Ipsum
Generate placeholder text
SVG Optimizer
Optimize and minify SVG files